



Description
Redefine what your car can do. MST?s industry-leading downpipe features the world?s largest internal diameter for B58 engines, delivering unmatched flow efficiency, intense exhaust acoustics, and dyno-verified power gains ? whether on stock setup or full race tune.
Features:
- 6"" Euro 6 400 Cell High-Flow Catalytic Converter: Massive diameter for low restriction and emissions compliance
- No CEL Guarantee: Designed to prevent check engine lights
- Dyno-Tested Gains: +18?25 HP and +4kgm torque on stock vehicle
- Suitable for 1000+ HP Builds: Race-grade construction supports ultra-high output setups
- Reduced Exhaust Temperatures & Pressures: Optimized flow efficiency enhances engine reliability
- OPF/GPF Ready: Versions available for both equipped and non-equipped vehicles
- Direct Bolt-On: CNC turbo adapter ensures seamless fitment with large-diameter setups
Important Usage Notice
This product is intended for OFF ROAD/RACE USE ONLY. It is not legal in all regions ? including the USA (not 50-state legal). Please consult your local regulations before purchasing.
CAT Warranty Policy
- Warranty covers Catalytic Converter-related CELs only (within 2 years of purchase)
- Free exchange of downpipe if a CEL is thrown due to our CAT
- Shipping costs are customer's responsibility
- Exchange processed via the original dealer after returned product confirmation
Vehicle Compatibility:
- BMW F20 M140i
- BMW F22 M240i / M240i xDrive
- BMW F30 / F31 / G20 340i / 340i xDrive
- BMW F32 / F33 / F36 / G22 / G23 / G26 440i / 440i xDrive
- BMW G30 / G31 540i / 540i xDrive
- BMW G11 / G12 740i / 740i xDrive
- BMW G42 M240i
- Toyota A90 / A91 Supra (2019+)
Year Range: 2016 onwards
Note: Ensure compatibility before ordering. Need help with OPF/GPF specs or dealer assistance? Contact us here.
Warranty
Our warranty terms are based on each manufacturer’s guidelines. Depending on the specific manufacturer, customers may be eligible to process warranty claims either directly with the manufacturer or through us. For detailed information or assistance with warranty inquiries, please contact our support team.
Shipping & Returns
Shipping time will be provided once your order has been processed. Please note that shipping options cannot be changed after your order has been placed.
For returns, kindly contact our support team for guidance. We'll walk you through the process and ensure everything goes smoothly.
Frequently Asked Questions
OEM (Original Equipment Manufacturer) parts are made by the vehicle’s original manufacturer and guarantee perfect fit and performance. Aftermarket parts are produced by third-party companies and may offer enhanced performance or cost savings, but compatibility should always be verified before purchase.
Yes, we work with a network of certified and approved workshops to ensure professional installation of your performance parts. Get in touch with us to find a recommended installer near you.
Yes, but it’s important to ensure they work together without causing performance issues. Some aftermarket parts are designed to complement OEM components, while others may require full system upgrades.
Yes, once your order is shipped, a tracking number will be emailed to you.
Orders can only be modified or canceled before they are processed. Please reach out to us as soon as possible.
If you're not completely satisfied with your purchase, you may return it within 7 days of receiving your order for a full refund, excluding delivery costs. Please note that this policy does not apply to special order parts. To qualify for a refund, items must be unused and returned in their original packaging.